possible new computer

[maurdr]

hey everyone i may be looking into replacing my current laptop with another one if i cant fix the current issues im having. my current computer is a Gateway p7805U with the 1920x1200 resolution. was wondering if you think id be able to properly run WoW with the new computer if it comes to that and also what kind of frames i could be looking at while just sitting idle in dalaran (that will give me an approximate of raids and other places.)

# Processor: Intel Core 2 Duo P8400 / 2.26 GHz ( Dual-Core )
# Memory: 4 GB / 4 GB (max)
# Hard Drive: 320 GB - Serial ATA-150 - 7200 rpm
# Display Type: 17 in TFT active matrix
# Graphics nVidia Geforce 9800m with 1 gigabyte dedicated memory

started having a possible video card issue. i updated my drivers and everything but im still getting glitched lines through the screen and things

if i have to upgrade to a new computer im looking at samsung R780.

Processor Intel® Core™ i5 430
Memory 4 GB (DDR3 / 2 GB x 2)
Display 17.3" LED HD+ (1,600 x 900) 16:9 Gloss
Graphic NVIDIA® GeForce® GT 330M
Graphic Memory 1 GB gDDR3

My main question do you think i will see a drop in performance or a gain? Also if i have to replace this laptop im gonna cry at the loss of screen resolution. caught a picture with my phone as i was playing L4D and this is how it looked