hmmm... the thing is you have to go and TRY lots of amps, cos you know what don't want (and that's some small 10 watt bee-in-jam-jar sound), but you dont know what is more siuted to you... Also dont be biased against smaller lower rated amps, have a look at this...
http://www.guitartricks.com/forum/showthread.php?threadid=2823
yeah, i know, it's long, but it tells you loads of stuff so it's worth reading...

By the way how much did the RP300 cost you? I'm thinking about buying RP200 but I'm not sure, namley because of the cost (the cheapest I've found it over here is about £170, that's $238!!! They retail in the US for $150!!!! me not happy bunny :()... Is it anygood?