LUM-TEC offer a lot of watch for the money and are well worth a look with your budget - http://www.lum-tec.com/collection.html/
And Christopher Ward offer a good range of chronos within your price range too -...
If you want to go new, check out the range of Hamilton. Some chronos within your price range below...
http://www.jurawatches.co.uk/collections/hamilton-watches/products/hamilton-pilot-pioneer-chrono-h76552955-watch-hm-543...