Slap intuition liners on your spantik/burantse should be good. most of shops i have spoken to think overboots are not needed with that combo. good thing about spantiks is you can actually climb technical stuff with them, so you don't need another pair for ice. I climbed full day out for about a week in Smuggs, VT with temp well below 0 and never cold with the stock liners.
I tried out Burantse in the shop, they are really really nice. As far as being less technical, I'm not sure how true that is. I feel they both are about the same with Spantiks slightly ahead (more rigid). Also, wearing them with gaiters helps as well, since the gaiters trap a lot of heat. If you don't intend to climb ice with them, then listen to others, but inverno or koflach on the cheap, put intuition liners in them, then a pair of overboots. In fact, I got a pair of Inverno for sale, size 9 if you are interested

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