If you’re used to playing 9’s, going to 10’s won’t be that big a deal. You will have to build up some more strength to bend the strings though. If you are seriously into the big, thick, warm SRV style Blues then you can try 11’s. If you aren’t and just want some more tone out of your strings stick with the 10’s. They are a good gauge (all of my electrics are strung with 10’s except for one which has 13’s because it is a fretless guitar). You will need to adjust the bridge to accomodate the new gauge of string though and most likely the action as well. Let a trained professional do it. DO NOT attempt to do it yourself unless you know what you are doing, have the proper tools, and have done it successfully before. Phil