I can understand that. It's just what you're used to. I always use linear and it's what I feel comfortable with even when browsing/pointing. Gaming mice don't have a toggle, per se. You could probably assign a custom macro to a Windows script if you're ambitious.
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Huh? There are definitely MiniDisplayport -> HDMI adaptors out there. Look harder :P
Yeah, Thunderbolt is miniDisplayPort with a few extras (power, data, etc) - so they are compatible. You want either mDP -> HDMI or DVI, unless you have a 27" 1440p (or 30" 1600p) monitor with Dual DVI, then you need Dual DVI :P. Unless you sell a kidney to buy the Apple Thunderbolt Display, which is natively Thunderbolt.
Third party mDP-HDMI and DVI adaptors are available and they are fine. There are also third-party Dual DVI, but they tend to be unreliable and should be avoided.
Should get to pick up my iPad tomorrow morning. :D