Depends on budget - there is no one particular wheel which is suited to the bike, to be fair.
To all other comments - the TB3 is built to a price point - and so it follows that the wheels will also be a compromise. That much is understood.
Blowing £150 on a set of wheels will not see a significant improvement in quality, in my opinion I personally don't think it is worth spending that on a set of wheels which will probably be no better than the set you already have. So here's my suggestions...
option 1 - Forget the wheels for now and just spend some money on some decent quality tyres. They don't need to be expensive. Something like a set of Rubino Pros will make a big difference to ride quality. Can be had for about £20 each on
ebay. Probably the best way to spend £40 next week.
option 2 - Anything from £250 upwards will buy you a
good quality wheelset which will last longer than the rest of the bike. At £250 you can get a pair of Shimano 6700, or another £100 on top gets you the excellent RS80. Something in between (ie about £300) gets you a pair of Easton EA50s - also very good. Here's the thing - you can hang on to the wheels when you sell the bike and upgrade to something else. You then have a decent set of spare wheels, which you may even prefer to the pair on your new bike, depending on what you buy.
Hope that helps.