I got thrown off...sorry...lol. Definetly leave the coupe tails stock.
The problem is you can't really get a whole lot of nice things for 1 bill lol. Like RVK mentioned, TL/CL-S steering wheel ($50-70 new on ebay) but you already have an OEM Accord leather one...so it's not quite the jump up from my plastic LX one I had.
TL/CL-S rear sway, and upper front strut bar are bargains and are functional.
And if you do black housing headlights, yes...DIY. OEM quality retained, and it's cheap.