You should purchase The Masnavi, translated by Jawid Mojaddedi. Authentic and rhymes. In english. Beautiful. Here is a link
which of these 2 should i buy? that or book of love that you mentioned?
I agree with you. Went right to Song of the Reed and basically stopped there, I just can't get through them. I'll have to go back and really read the intro though, it does have very good background.
What decent English translation of the entire work is readily available though--just R.A. Nicholson?
I just started this book as an intro and I believe it incorporates Nicholson's book 1 in it as well, which is a lot more readable:
Rumi's Mystical Design: Reading the Mathnawi, Book One https://www.amazon.com/dp/1438427964/
I'm spoiled on the few selected translations I've read from Kabir Helminski, who apparantly used Nicholson as a source, but I dont think he's done whole book translations. His are superb.
Edit: Helminski's book that contains a few Mathnawi translations: Love Is a Stranger: Selected Lyric Poetry of Jelaluddin Rumi https://www.amazon.com/dp/1570625271/