Prima Luna or sonic frontiers or audible illusions


I have an audible illusions 2d. It has served me well for many years. But, it seems I have the upgrade bug of late. I am looking to increase the imaging if possible of my system and am curious if upgrading to the modulus 3a would be a significant improvement. Or, would I be better served with a sonic frontiers sfl1 or line 1/2? Lastly I have to admit that the prima Luna prologue is appealing bc of the exposed tubes. Not sure on the sound though...any advice? Any other choices that have the tubes on display?
2out2sea
I would have to agree that the Modulas is by far the better sounding preamp of the three, even if your main listening is done with your digital front end,with that said the phono is why you buy the Modulas 3A or 3B. There is a factory refurbished 3A for sale now on Audiogon with warranty for a little over 1,500.00 and it has the John Curl phono boards. I currently run the 3B with the JC board, had it built 4 years ago to replace a Modulas 3A. Also have a Lamm LL2 line stage coupled to an Allnic 1500 phono that serves in the same system, not better than the Modulas just different. Tooblue.
good call on the phono section...i don't need it. i'm a digital only guy. i know that is sacrilege, but it is what it is. a line stage only will serve me just fine. unfortunately i seem to recall reading that the modulus performed better than the linestage.

i have had good luck w/ my ai 2d, i hate to hear that others have had bad luck. it's the outboard power supply and dual mono that makes the ai appealing. similarly the prima was attractive b/c of it's dual mono configuration.

i looked at the vac preamps. not sure how the standard stacks up, but i can't afford to spend 3-4k on a used pre. 2k is the top of my budget unless there is something that will be truly earth shattering.

can anyone speak to the specific attributes of the aforementioned pre-amps? my 2d throws a big soundstage, but the imaging is a less pinpoint.

thanks for the advice.
I had a 3a and a Jolida Fusion. Rotated them in my system for a couple months. I sold the 3a. This was primarily due to not using the phono stage and thought it a waste to run the phono tubes. It sounded great however. The Jolida is a fine pre for the money ($1295 new and can be purchased with upgrades which still keeps the price below 2K. Not much to look at compared to the Prima luna. Not heard that pre, but would like to compare against the Fusion.