I'm getting back into cycling after a 20+ year layoff. I just took delivery of a 1987 TREK Pro 560. I thought I would push the edge and try the original 700x25 size tires (I'm ~300#). It arrived with Panaracer Stradius Elite Z tires sized 700x23. I'll be riding on rural roads in good to excellant condition with little to no traffic. Can I get away with the 23's or should I forget about them and buy different tires before I start riding? If I need new ones, any suggestions? Preferably not over $50/pair.