SWR 350X: 2X15's or 2x10+1x15?

[bassyRyan]

Just looking to get the most efficiency out of the setup. I heard that two identical cabs are better than two different ones. I already own a SOB and was thinking of adding a Golight 2x10. Would a Golight 1x15 be the better choice? I would like the cabs to share the load and not deal with one reaching it's peaks while the other is underpowered (that's a bad word here, I know).
Thanks.

[bassyRyan]

bimp

[billfitzmaurice]

Try both combinations side by side, it's the only way to know which you prefer. If you don't have that option add a second identical cab and you'll know that they're well matched.