As far as syncing issues, those should iron out as the network expands with more and more users. For now here is a list of addnodes from the masternode we have running:

addnode=69.180.58.29
addnode=128.68.210.180
addnode=31.132.225.0
addnode=77.2.30.196
addnode=14.164.203.3
addnode=104.229.188.243
addnode=162.211.173.18
addnode=213.55.176.212
addnode=31.148.219.41
addnode=188.113.136.160
addnode=98.234.11.108
addnode=162.211.173.18
addnode=189.75.112.86
addnode=97.98.56.138
addnode=77.2.18.205
addnode=219.111.162.87

You can add them easily to the yup.conf file via the qt wallet by clicking tools->open wallet configuration file. Add the above bit, save and close it, relaunch the wallet.