I build wheels for myself and you are looking for reliable. I would go with 32 rear and a radial 24 in the front. Some Novatec hubs and DT swiss 440s are what I am thinking of building now. The 440 comes in an offset rear and the new model is welded. Go with basic DT DB spokes and you can have a reliable set that can take it and not worry. I use this count and I am 176. Spokes do not weight much and they will keep the wheel working even with more. Do not buy into the 16 20 business as you mentioned you ride solo and do not race.