big time hoarder here too. love the lites. i have some C7 and C9 LEDs, in the fake ceramic coating. they look the best, IMO. i prefer the look of regular incandescent for the minis though. i cant swallow the power cost of the real C9's either.
also, its nice to able to attach 170 sets of the LEDs end to end. yes, 170. as opposed to 2-4 sets from anything else. when running along the gutters, thats REALLY handy, as you have no need to run a new cord to a start point every 50 ft.
on the OP. id recommend GE industrial/commercial for the minis. they are REALLY tough. usually sold in rolls of either 300 or 600. also tough to repair when the time comes, cause the bulbs are press fit to the holders, and the holders fit REALLY well into the sockets. but they are rated to hold their own weight for up to 60 ft spans and i have yet to damage the three rolls i have.
as for the LED c7's and c9's, i like the ones my wife got me from (of all places) Michaels (yes, the craft store). they are REALLY short, (like 12ft), but if you watch for the sale, and bring a coupon (40% off tacked on to already 20% off sale gets you each set for around $4.50), then the length doesnt matter, just get lots of em. like mentioned, you can string together enough to go about 1.7 miles.
and im still a fan of the combination 140 sets that blink in waves and flash and such. used to be called multi-function. i have at least 15 of those, but i didnt see any at lowes this year, so they have finally fallen out of favor for the programmable LED's...which i despise.
-J0N
EDIT- also, i have found in my time (abut 15 years doing lites as a side job) that leaving the lites ON in the rain and snow drastically increases their survival. somthing about the heat keep em from corroding and failing when you DO turn them back on. BUT, make sure your cords ans such are out of standing water, (DUH).