There are plenty but you fail to say what your interests are.
The three Sigma 2.8 lenses are superb value and great optics, the 19, 30 & 60 can be had for £125 each on eBay brand new. The Olympus 45 f1.8 is a cracker too and can be had for £220ish new or about £160-180 second hand.
Other fantastic lenses are the Olympus 12mm f2 and the 17mm f1.8.
There are a plethora of lenses but depends what you want.

Now now minnnt your not trying to lead me to bankruptcy are you for your own personal reasons ?![]()
Obviously you can use any number of old manual lenses with the appropriate adapter which opens up a massive new pit... :nailbiting:
And what ever you do... DON'T look at the owners thread on the mu43 forums...![]()
I am in a similar position, thinking about ether omd or Fuji x. Both are capable of great photos its more down to personal preference really, if you read up on some sites the Fuji cant focus and on others the ond is poor picture quality! but in reality its just nit picking between the two.Hhhmmm Iv spent some time looking into my options and it appears I have to sell my dslr kit to make the most of this system , now opinion on mft vs the Fuji x system vs Sony A
sorry I worded it poorlyHmmm I own the omd em5 and I think I need to spend some time customising the controls cause it seems to have enough dials/ buttons to be manual enough for me ?
im not sure if you can adapt yashica lenses but if you can I would say get some ..they are superb
More money than the superb Oly 45mm f1.8....Much more bulky, and no autofocus option....Is it really worth it?when I used m4/3 I found the Carl Zeiss Planer 45mm f2 Contax lens and the Konica Hexanon AR 50mm f1.7 to be really good - although the original Metabones Contax G to m4/3 adaptor was a bit of a b****r
More money than the superb Oly 45mm f1.8....Much more bulky, and no autofocus option....Is it really worth it?
Possibly...My main attraction is that it is a small compact package...I guess it is different for anyone....I've played a lot on Nikon with their old lenses which were great for manual focus and automatic metering...However the size and weight make sense there...To me getting a non-native manual focus for more money than an excellent native, auto focus, razor sharp lens...It will have to be spectacular to be worth it...Sure I do manual focus with my native auto focus lenses as well. especially to get the 'zone' for certain type of shots...And with focus peaking on my PEN5 and G6 it is so easy....yet for most scenarios why bother with it....However we are all different...I had the Contax lens
I agree that the dedicated m4/3 lens are very good - particularly the Pana 20mm f1.7 which seems to be able to "do everything" within reason, plus the original 14 42mm is good ……. but when you get into m4/3 part of the fun is experimenting and using old MF glass - the Nikon, Canon, (the FD 35mm f2 is good), Pentax and Voigtländer are all worth a try …… the Zeiss lenses were/are in a class of their own …………. one of my favourite lens is the Biogon 28mm f2.8 ZM
s the 90/45 iv got and they came with a metabones sony adaptor , is there a valuation thread ?The metabones adaptors are generally the best for Contax-G lenses because they have a more complex mount.
A friend of mine uses the 90/45 on his Nex6 and the adaptors are generally around £80 each. Due to then being more complex, they're more of a pain to fit to the lens than most others so he has an adaptor for each lens and leaves them attached.
Cheers
Steve