Hey all. I've had a HT20 MKII head and Blackstar 1x12 cab setup for a little while and I do enjoy it, but I only recently got my first overdrive pedal (a Boss Super Overdrive) and it's left me feeling that the overdrive channel on the amp is a bit muffled and lacking in comparison to using the SD-1 on the clean channel -- which sounds great and I love the sound of that. I've been thinking I wouldn't mind trying something to replace the stock Blackstar speaker in the hope of getting the amp's overdrive channel sounding a bit clearer and more defined. The cab is the newer Blackstar one with the removable back section and has a Blackstar branded speaker... Blackbird, I think. I mainly like crunchy blues to hard rock tones atm, but I do want to learn a bit more metal and shreddy stuff in the future. The cab has its rating of 50W written on the back, which is what the stock speaker is rated at. Will it matter if I put a higher or lower rated speaker in the cab? (I realise that I shouldn't put a 20W speaker in and then hook up a 50W head and crank it to 11 though.) It seems like a Celestion V30 could be a fairly safe bet to try out, but I'd really appreciate any suggestions or advice. Cheers!