It will depend on your needs, there are quite a few out there to choose from in that price range, and I couldn't say which one will suit you best without knowing exactly what you want from it. I have used wireless ones in the past, but found them more trouble than they are worth, partly because you can't wear a HRM with them, and you can also get interference from electrical installations. When I used one with a HRM I was doing 20 MPH while I was stationary at a set of traffic lights, and once managed some 50 MPH along a canal towpath that hadr an electrified railway line next to it. If you really want one, Cateye are a reputable brand. I've used their wired devices, and found them to be reliable. Which one is best depends on what you actually want to monitor. Personally I think things like actual speed, cadence, trip distance, time and average speed are the most important measurements, but you might have other needs, for example a second trip recorder can allow you to keep track of weekly or monthly distance. I've attached a couple of links to web sites you might find useful, Wiggle generally have good prices, and swift delivery. Personally I now use a Garmin 705. It provides far more information than I'll ever need, but it's accurate, easy to use, and can show me the shortest route home should I need it. On top of this I can use it on y of my cycles, so I only need the one device, and as an added bonus, it seems to be less affected by outside interference. EDIT:- If you want a good wired computer, I've used the Cateye Strada Cadence before I got my Garmin, and was very happy with it - it's now fitted to my son-in-law's cycle. They are currently on sale at Wiggle for £35.99., You can find it on the attached link.