A couple of ??'s
1. How large a venue do you usually play? Are we talking pubs, bars, louges, concert halls?
2. Are you running sound from the stage, or using a soundman to mix for you?
3. Where is your (and your amp's) position on stage in relation to the other members?
4. Are you running through the front end with your keys, in addition to your amp?
5. How is your monitor mix?
6. Are you Up against a wall of Marshall Stacks?? What are the other members using and casn they not bring it down a bit. Sometimes less is more....
7. On a personal note...I would suggest going through something larger than a 12" & a 10". I'm pumping 35 watts through a 15" and it's more than enough.