go for a DE-5000 they dont cost a fortune and will work well for most jobs
all the other made with avr pics can be good, it depends on the firmware quality and checks, i have one m328, it is a surprising gizmo, i made the externals reference mods to have better quality and stability
there's a thread here about thes models
But for a beginner, go for a hassle free model like de-5000, mastech ms5308 (is higher priced for nothing) they have the same chips inside ...