4 line SIP phone?

I’m looking to get a few SIP phones for the asterisk server I’ll be building. I need 4 phones for right now, so I’m not trying to spend a ton of money on these. The thing is I’m going to have 3 or 4 lines, most of the phones I see are only 1 or 2 line. can someone recommend a good multi line SIP phone?

could you also recommend on where to get these phones (if thats allowed by forum rules)


I use the Polycom 601 phones and they are 6line phones.

how hard were they to configure? are they easy to use?