I bought this one:
http://www.superiorthreads.com/shop/...FRJk7Aod-gcAcQ
It is the best I've used. It's heavy and convertible. The Connecting Thread one is quality but limited in use. If you only want the vertical then go with pretty :
http://www.connectingthreads.com/too...r__D71253.html
Any of these will last for almost forever.