I purchased a basic, used, rimmed 125 (it does at least have the overflows) for a few hundred dollars for my current tank. Now that I am more involved into the hobby I wish I would've bought one of the fancy looking rimless tanks from a respected manufacturer, but when first starting off there is no chance I would've paid thousands for the tank. So in my case I actually don't regret getting the cheaper basic tank because it's what got me into (well actually back into) the hobby.
I've considered switching to a custom tank that is considerably bigger, but I'm lazy and don't want to do the work to switch it over.
If you have the money and know that you will enjoy the tank for years to come (not get frustrated with it and quit the hobby in a year or two) then I'd say get the better tank. If you aren't completely dedicated to the hobby then I'd just start off basic so if this hobby isn't for you it's less of a lose money wise if you take the tank down. This hobby can be very frustrating at times and sadly many people don't last long before giving up.