what are some things i should rough in for future panels, the shingles are already down but i was thinking of running two 2" conduits from the panel upto the attic is there any other things i should do to make future install easier

2" conduits may be overkill. Verify what kind of wire you will need to pull for the distance.

Consider a secondary location for the inverters so the DC runs are as short as possible, then go to the panels from there.

The most important things will be the panel mounts. Make sure you know where supports are and add some blocking if the spacing is not compatible with the mount plan.

It appears to be too late to preplan the roof penetrations.

Depending on the type and size of system you want the conduit details will be different.

But to be safe, you should only need 2x 1" conduits (enough for 20kw worth of array easily) but they need to be metallic, either emt, metal flex, or galvanized rigid conduit. We run emt inside building almost always. The reason for metallic conduit is because if you a string inverter system, then the wires in the building will have DC voltage, and the national electric code(NEC) requires DC wiring in a house to be in metallic conduit.

The 2014 NEC now has a requirement for a rapid shutdown feature, which MIGHT require a separate conduit for signal wires to go to the array and sever the DC connection at the roofline. So an additional 3/4" PVC conduit might be a smart idea as well. In reality the 2014 NEC is so new, that there is no real standard solution for the rapid shutdown requirement, but as you are planning for the future, 3/4" PVC is super cheap insurance. Using micro inverters solves the issue, but the is no guarantee that micro inverters will be the best fit for your site, so it goes back to adding the cheap insurance...