I like Colin and would take my Lotus to him -- if I lived in Seattle -- for those things I do not (or cannot) do myself, but dialing in an alignment and corner balancing really isn't difficult, and most any shop can handle it. What matters most is attention to detail and the willingness to spend the time to get it right. I actually use Firestone Auto for my Lotus, as I bought the lifetime alignment, so they'll fuss with it endlessly without charge. And I did my own corner balancing using borrowed scales.
Remember, too, that you can drive your car onto an alignment rack, dial it in perfectly to your exact specs, drive it off the rack, and drive it back onto the very same rack secons later, and your specs will always be off by as much as several tenths of a degree. Small differences really do NOT matter, at least for our purposes, so there's no point to being too picky about your settings. Get them into the ballpark and call it done.
Further, I'd argue that few of you (no offense intended, but I believe it to be true) will notice a difference from corner balancing your Lotus unless the settings are already WAY off. Lotus designed the car quite well in that regard, and there isn't all that much to be gained purely from corner balancing. Rack matters a lot, so ride height is more sensitive, but pure corner balancing won't really change how your car feels to you at the limit.
My two cents. I'm sure there are people for whom this is all religigion who feel differently.
Twin