Dear "Overwhelmed",
Having information, I suppose sales and/or product data is a good thing. The more informed & educated you become, the better decisions you can make. However, as Hank accurately points out (since the price range you quote is in UK-pounds) it is more realistic to focus on bicycles available in your residential area. Unquestionably Brompton in the UK is a "premier" brand. Also (if available) Tern. I personally have very positive experiences with bicycle dealers (bicycle stockists in UK vernacular) although there seems to be a recent trend towards purchasing bicycles online. (A bicycle is not a cell phone or a I-pad!) If possible, you should establish a good relationship as soon as possible with a local bicycle stockist. Either purchase from him or consult with him regarding your purchase. Spend money there....wear a helmet,cycling gloves,light(s),chain or cable & lock.....the list of what you need could be finite or infinite. The important point is that you want that bicycle professional to recognize you and value your relationship. You might need him someday........

Cheers!