I mounted up a set of H-B crash bars some years ago on my '08, then when I bought the '09 for in Canada I tried to get a set, but (luckily!!!) could ONLY get S-Ws, so installed them.
Last summer I bought a set of S-W 'skid-plates' for the '09 and installed them. I'm very happy having them, and the way they look, so ordered the same for my '08 here in AZ.
Another 'inmate' - Roam - inquired whether or not they'd fit with the H-Bs.
One of the problems I encountered was that the engine mount bolts go into 'captured' nuts, held in a 2/3 aluminum embrace on the front of the engine, and when I installed my H-Bs I could NOT get the required torque to them as they would turn, so NOT captured!
I tried various solutions (like trying to use a screwdriver blade forced against the nut to allow the bolt to be removed or tightened), but to no avail. I talked with a welder who agreed that we could weld a piece to one of the nut's 'flats', long enough that it would turn slightly and then lock-up against the engine case, allowing removal or installation. BUT (and there's ALWAYS a but...) for safety I should remove the computor and a few other things to protect my V. Did that over the last few days (I had a friend who would carry my V to the welder in his pickup), then down there for 30 minutes of welding, then home where I set up to TRY to mount my S-W skid-plate.
Now I can tighten the engine mount bolts or remove them, but when I tried the left S-W skid-plate mounting piece I saw that it would be 'fouled' by the left H-B mount, so - NO GO!
The only solution I can see is that I will order a set of S-W crash-bars, remove the H-Bs (and WILL put them FOR SALE here) then install the S-W bars AND skid-plate.
I'll add pics of the welded engine mount nuts so you can see what I've had to do.