It is a pity you feel like this, there is nothing worse than noisy neighbours and I do sympatise with you.
Do you actually have your house on the market?? If you dont want to rent it, your best bet is to try and sit it out until you get a buyer.
You have a great deposit build up for your next house, carry on saving and keep an eye out for all the bargains that are out there at the moment.
Be sure to do your research for the area you intend to buy in, check out the area well, talk to local residents and always drive around the area at night to get a feel for the place.
Good luck and hang in there, you are luckier than alot of others, you have a secure job, a good deposit and you are already on the housing ladder. Your glass is half full rather than half empty.