OK, let's get the tech experts involved: if you're boiling the same amount of water, wouldn't you use about the same amount of gas, whether you use one stove or two? (I don't know, because I have little to no experience cooking for two.) If fuel usage is the same, a change might not be worth it.

I've used the soloist pot once, and it's not too bad - just a bit large and heavy for my needs.

How about the Snow Peak 1400 titanium? It's on sale right now at Backcountrygear.com for $40. it has an added advantage: the lid is large enough and deep enough to function as a plate. Take your 700's for mugs, one eats from the pot, and the other from the lid. (Unless you're doing freezer bag cooking.)