I use to feel the same way about thick picks. Never understood why so many people recommended them, even for strumming on an acoustic. Used to use the .60 Tortex sharps or wedge. Then I tried Gravity Picks. I ordered 2 picks to try out (a .70 standard and a 1mm sunrise). He ended up...
I had a 6505 + 112 and sold it. Picked up a Randall RG1503 212, and while it was definitely easier to dial in at lower volumes, it just didn't sound half as good as the 6505 when I turned it up. So now I've returned the Randall and have another 6505 on the way. I tried my MXR 10 band EQ on...
I have no idea if they're better than the 707's or not, but I have the same guitar, and was thinking of trying the Juggernauts as well. I contacted BKP and they said the Juggernaut was made specifically with basswood in mind. And they would provide everything I needed to fit them in my guitar.
How loud are you looking to play in your bedroom? If you're dead set on the 6505 + combo, I would pick up a power attenuator to go along with it. I know there's mixed reviews on that amp at bedroom volumes, but I had one for a short period of time and really didn't think it sounded good unless...
I'd go with a .068 or .070 for drop A. I have an Ibanez Iron label, also 25.5", and I wouldn't go any less than .068 for that. I had the guitar shipped to me with the .068 on it, and it was way too loose going any lower than drop A. I went to a .074 and it's pretty much perfect for drop Ab and...
Sorry, no advice on getting the Merrow sound, but in my experience, I've had better results with the MXR 10 band EQ in the FX loop on any amp I've tried it on so far.
I picked up a Spider IV 75 and returned it the same day. I have no experience with the 2 Randall amps that you listed, but I picked up a Randall RG1503 212 and I really couldn't be happier with it.