Bought a L/C/R...what surrounds?

So I'm finishing up an upgrade. I had a SVS SCS-02 5.0 system (SSS-02 surrounds). After auditioning the verus grand from aperion and the VS series from Boston, I decided to keep the VS (260 x 2 + 325c)

I was going to buy 2 more 260's for rear surrounds, but was worried about he rear port, since these will be bookshelf placed against a wall.

Can anyone recommend and good rear surrounds? My budgEt is up to $500 for the pair. I'm not too particular if their dipole/bipole or not.

Rest of setup is:
Pioneer sc-35
Svs pcs12-NSD
BA vs 260 fl & fr
BA vs 325c center

Ps I can't keep my SSS-02 set sinc I sold my svs as a set.

Thanks!

'ski

As always, thanks for the suggestion - how do you think the E60 would fare? It's not sealed, but being front ported should work as a bookshelf, right? or do think it would be overkill to relegate it to surround duty?

One last question, and I promess I'll let this thread die peacefully.

If I cross over all speakers at 80 Hz, would it be a problem to have a rear ported speaker? Would much bass be sent to the rears to be noticeable?

I'm not adverse to the E60's at all, but -- if it doesnt affect sound quality -- would liek to stay in the VS series if possible.

thanks again!

2 more vs 260's are on the way. In the end I wanted to say as timbre matched as possible.

Thanks For all the help Jim!