When you go in market to purchase a PC(Desktop/Notebook) you should be very careful on what board, chipset and processor you are purchasing. Normally detail information no dealer will give you or perhaps they themself are not aware. What will happen is, in the end you land up purchasing a PC with low cost  but difficult to upgrade later. You will need a purchase completely new one,  For example I would be happy to spend 5k to 6k if I want to switch from Dual Core to Core2Duo processor, but my board would not support as a result I need to replace major components of my PC. Generally Indian customers would not prefer.

With my few findings from Intel and other sources if you want to purchase Intel based PC my recommendation would be as below.

Desktop: 

• Motherboard: Select 965 Chipset based boards like DG965RY supporting Dual Channel Memory
• Processor: Pentium D 930,940,950 or 960. depending on speed you want to select.  OR
• Core2DUO E6300 or E6400 are good for home/developer segment.
• L2 Cache is very important as its responsible for speed. Go for 2 or 4 MB L2 cache
• Ask for 7200 RPM Hard Disk
• DDR2 1GB is Good for Home users and (n)GB for developers (a developer understands why I say (n)GB.... LOL. ..... by the way 965 chipsets are capable to support up to 8 GB. )
• Select LCD monitors 15" or 17" are good and should be wide screen ones. Good if you want to watch TV/Movie on it or work for long hours

Cost for above as on date May 25, 2007 should be between 23 to 31 thousand.

Notebooks:

• For home segment users, I would say any notebook with Core2Duo would be fine, but if you are a developer and want to do serious development work with power of your desktop then select higher model and of course it will cost you quite a bit. 90K to 1L INR.
• I hate 1.6, 1.7 or 1.8 Ghz models with 945 or older chipsets.
• Its 2007 so select Intel's newer Core2Duo family of processor and chipsets called (Santa Rosa platform). Santa Rosa refers to the fourth-generation Centrino platform
• Motherboard: Intel Mobile 965 Express chipset with Intel's GMA X3100 graphics (Vista Aero Effects support), 800 front side bus
• Processor: Lookout for Logo "Centrino Pro" The refreshed lineup of Core 2 Duo laptop processors now include T7100, T7300, T7500 and T7700 models, designed for 965 Mobile chipsets,  800MHz front side bus, compared to the first generation of Core 2 Duos for notebooks with 667MHz FSB.
• Intel PRO/Wireless 4965AGN (Wireless-N technology boasts a 5X speed increase, along with a 2X greater coverage area, and supports 2.4 GHz and 5 GHz bandwidths, enough for high definition audio and video streams)
• Chipsets supports up to 4GB of RAM DDR2 533 and 667Mhz. 

From various sources I found following notebook models with Intel Centrino Pro:
Acer: Aspire 5920
Asus: A7S, 8SC, F3SV, F3SC, G1S, G2S, WZS
Compal: IFL90, IFL91, IFT00, IFT01
Dell: D630, D830
Evesham: C515SR, C535SR
Fujitsu-Siemens: Amlio Pi2515, Lifebook S6410, Lifebook T4220 convertible tablet, Lifebook E8410, Lifebook E8490, Lifebook A6030, FMV-BIBLO MG, FMV-BIBLO NF, FMV-BIBLO NX, FMV-BIBLO LOOX-T
Gateway: E-265M, E-475M
Gigabyte: W251U, W466U, W468N, W566N, W756N
HP / Compaq: HP Pavilion Dv2500t, HP Pavilion Dv6500t, HP Pavilion Dv9500t, Pavilion HDX, V3000, V6000, 8710, 8510, 2510p, 2710p convertible tablet, 2510p ultralight, 6910p, 6710, 6510b, 8510p, 8510w, 8710p, 8710w
Lenovo: Thinkpad T61
LG: R200, R405, MB500, R500, E500
NEC: VersaPro Type VD
Panasonic: Let’s Note CF-Y7
Samsung: Aura Q45
Sony: Vaio AR, Vaio FZ, Vaio SZ
Toshiba: Qosmio G40
TwoTop: ViP Note-ZS, Progress GXT7500, Lesance MS212IW-C2D-GT
Zepto: Znote 6625WD

The 5th Generation of Centrino Platform is expected in 2008 expected to support WiMax, DDR3-800, High-Speed Downlink Packet Access (HSDPA) 3G mobile telephony protocol.

Would love to hear if you have any questions, or any information which I could add here. Please feel free to add your valuable comments