Please help? Upgrading my M/B

Hello everyone!
I am thinking of upgrading my motherboard to Asus P5KPL - AM/PS. That is the one suggested by the shop keeper himself. Please suggest if am going for the right one. He is asking for 2900 INR for this motherboard and also telling me one benefit of the same M/B having Burning components warranty i.e ANTI SURGE.
Also suggest if you'd want me to go for any other M/B except this for economic price and long term and which would also support High Quality GFX card etc. in future, which works on Petium D processor (Dual core 2.8 Ghz).
And also if you could suggest any M/B with 8gb RAM Expansion Slotz.
Thanx in advance :)

My present PC config:
Intel Processor: Dual Core 2.80 Ghz
Motherboard: Intel D102ggc2 with ATI Rade on Xpress 200 on board gfx card
RAM:512 MB,533Mhz
PSU:
Circle Technology

AC Input 200-240V/63Hz/5A
DC Input +12v -12v +5v -5v +3.3v +5VSB
14A 0.5A 25A 0.5A 14A 2.0A
+/-5% +/-10%

Cable Connector
ATX 20 pin(20 pin) 1 HDD/ODD 4
ATX +4 pin(4 pin) 1 FDD 1
ATX 12V CPU(4 pin) 1 SATA 1
PCI - E (6 pin)

Size L150 x W140 x H85 (mm)