Don't know what "this" refers to. I think the reason you haven't gotten much response is that it's impossible to buy a good road bike in that price range, at least a new one. Decent entry level bikes start in the $800- $1000 range. Major brands in the same price range will be comparable quality-wise. You need to try a few out & see what fits you best. With a 300-50 budget, you may be able to find a decent used bike. Do some reading in these forums to familiarize yourself with different features & components. Then when you find something that fits you and seems like a good deal, post the particulars and you should get some feedback.

Dan