The Inspiron 13z is your average laptop with basic GPU. Its a little old and might not handle your games so well depending on what games you are playing.
Its hard to recommend without an estimated budget

Added on June 27, 2012, 10:34 amI'm not sure whether if its cheaper here or there
You can try these:
Asus
N45SL (Jay-Chou edition), i5-2450M + Nvidia GT635M@RM2899[Bang & Olufsen], 750GB (7200rpm), Color: White
Dell
Inspiron 14R (Special Edition), i5-3210M + Nvidia GT640M(28nm Kepler)@RM2199[2.38kg], 4GB, 500GB(7200rpm); backlit keyboard optional
Inspiron 14R (Special Edition), i7-3612QM + Nvidia GT640M(28nm Kepler)@RM2799[2.38kg], 8GB, 1TB(5400rpm); backlit keyboard optional
If you wan light weight, you can go for this:
Dell
[Ultrabook]Inspiron 14z, i5-3317U + AMD HD7570M + 32GB SSD + 500GB(5400rpm)@RM2599[1.87kg], 4GB, 500GB(5400rpm) *no VGA port
Yes they will automatically detect wifi

I've heard from many of my friends that Dell has over heating problem, and that the fan does not function well I think.. Do you have any other recommendation?