Well, being new to MTB I'm slowly getting feckered off with my own system, but also because I'm not sure what the best way forward is...?
I have only a pair of SPD-SL Mavic road shoes which are remarkably resilient but are, make no mistake, being wrecked slowly with all the mud and gore of Ashton Court trails, however friendly they are.
But, I don't use my Ultegra pedals with them, oh no. I learnt after the 2nd ride that the dirt accumulated made them impossible - lesson learned, you don't want to do it like that etc But, I had an old pair of Look Arc pedals which also work with the SPD-SL cleats (they're not supposed to) but they click in and out a lot easier than they should, with the added bonus of not getting as irretrievably clogged with mud as the Ultegra pedals do one-mile into the trail.
I can't keep with the system though - the Mavic shoes will be dead very soon if I do and so I'm looking for an alternative...? Last weekend I went out on the Saturday and a fellow rider pulled me up and proclaimed that I was the first rider he'd ever seen with an SPD-SL system! So, I explained the above. He had some Shimano M520 pedals and they look like the way forward - any good to any of you who might use them?
My point being, I'm interested in the OP and how you get on with the flats because I just can't see that I could have it any other way than a clipless system, but I may be wrong. Be interested in how you get on SRJ10..?