I agree with the above posts...if you can't afford the appropriate hardware to drive the 5's (or now the 5A's), you'd be better off going with the 2Ce Sigs or the 3A Sigs.
Also, don't get caught up in the "It can't be good if it's not uber-expensive" mentality - especially with the Vandy's. The 2Ce Sigs are nothing to dismiss, and the 3A Sigs are so good that I personally can't justify lusting after the 5's.