The Hepco Becker engine guard covers the radiator, and that is point that will hit first ($X,XXX): save $100 on sale? After getting the HB crash bars put on with my SW rear aluminum rack (from twisted throttle) 5 hours later, I fell on my right side and just had to spray paint both bars nicked where they hit the blacktop: no damage o/w..
As for the skid plate, are you riding off-road? If you don't have a shortened mod, you can add a little more (useful) weight and get a SW centerstand (also from twisted.) Definitely keep your radar going when looking for any ticket size item (w/shipping and tax combined) but make sure that is most protective and most useful item you will need first. If the sale is what you were going to get anyway, great: o/w I rarely buy because of a sale alone to add dead weight. ymmv