I will vouch for North Wood's statement about getting real cycling shorts, with a chamois. While I have been able to ride 1-2.5 miles to the gym or work, without it, it took me awhile. You can have comfort and trim/form fitting at the same time.
I also second the vote for Terry cycling clothing. They have a wide range of sizes and great customer service.
North Woods, wear your cycling shorts *under* your tights. You'll be more comfortable. I have 3 pairs of various levels of fleece lined tights, with no chamois. I can use them for cycing, hiking, snow shoeing and nordic skiing.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport