Seamus,
I just checked the prices of the RS-5 and the Alesis qs6.2. It looks like they're both going for around 600 bucks. In that case the QS6.2 might be better than the RS-5. The RS-5 has a pretty good apregiator, I don;t know about the QS6.2. But the Yamaha S-03 is about 500 bucks.