EX5 has sampling capabilities<----very attractive feature.
Never tried an NE5.
But ive had an EX5 and an XP30. Its hard to synthesize with either cause you have to program with tiny menues. but the xp30 really sux for that. You can't sample with an XP-30
Check out the intruction manuals before you bye anything. Both manuals for the ex5 and xp30 suck but check it out foryouself.