I'm looking at buying my first road bike and really like the Liv Avail 2. I've sat on the Small (Avail 2 2017) and XS (Avail 5 2015) apparently the only difference is the colour, so I've been told by the bike shop. I'm 5'2" and according to the Giant size chart I should have an XS but I feel more comfortable on the Small. What should I do? I'm not planning on doing huge amounts of cycling just a couple of rides a week 20-30 miles each.