You did good on the tires, we run the same ones on our 07-3400rl. Tireco (the distributor fr the factory junk tires) told me those are an upgrade over their tires.. As for shocks, go on the Monroe Website
http://catalog.tenneco.com/monroe/shockSelector.do, I found a listing for Monroe Shock Selector
Recreational Vehicles - Ride Control Section
ALKO/KOBER TRAILER AXLE
ALKO/KOBER TRAILER AXLE
Models w/ 4600, 5000 & 7000 lb. Axles
OEM:0 555001 GAS-MAGNUM® RV SHOCK ABSORBERS 555001 OEM:0
OEM:1 555025 GAS-MAGNUM® RV SHOCK ABSORBERS 555025 OEM:1