Heya Hifiguy...
Welcome to the site, and the wonderful world of Triumphing.
Know what you mean about wanting your bike to be perfect - sounds like you'll fit right in around here. The lens is easy enough - two screws. I've never done a lever on this bike from from a quick look there's no reason to assume it's any more difficult than normal - undo the locknut on the bottom of the bolt, unscrew the bolt, remove the lever, then reverse with the new one. The mirrors're easy too, undo the screw, be careful to catch the spring that's under it, slip the old mirror out, then reverse the procedure. That's actually a really good excuse to buy yourself some funky aftermarket mirrors too. Likewise with the turn signals, there's lots of prettier aftermarket ones out there than the giant pumpkins Triumph gave us.
The driving lights can seem a little daunting at first but they're actually pretty simple, being mostly plug & play. The hardest part is threading the wires through the bar itself - several members have reported it's easier to cut the connectors off, then crimp new ones on than try to feed the connectors through the bar.
Quite a few members (myself included) have either felt that the driving light kit is too expensive for what it is, or that they preferred a slightly different look and have found aftermarket options to the OEM kit. A lot of us (myself included again) have also removed the front turn signals from the handlebars and mounted them below the driving lights. You can find information on fitting the driving lights, aftermarket options, turn signal relocation and lots of other mods on
my website.
Again, welcome - I'm sure you'll find people to answer just about any question you may have about your new ride here.
Matt