I have a 6 month old and would like to get a baby jogger and a bike trailer (either two separate ones or a convertible that does both). I am a competitive runner (sub 2:30 marathoner) and would like to know what thoughts runners have on the subject. I can't find any decent reviews anywhere. Also, we'd like to have another child about 24 months apart. Should I get a double now (extra size and bulk) or just wait?