Do I have enough electronics for Contour s1.4?

Most-likely you'll have enough of electronics for s1.4, but why you would target speaker you haven't heard for upgrade?
If you provide your room/placement description, you'll get more useful answers. Do you like to listen LOUD?

I have owned Dynaudio Audience 42, Focus 140, Contour 1.4, and Confidence C1 models. I have at times used the same Musical Fidelity a3.2 integrated and cd player as you, and later the a308 integrated and cd player. It is my opinion if you like the Dynaudio sound you will notice a clear and very pleasant improvement. The 1.4 is a more refined speaker than the 52se. At least it was to my ears when I listened to both of them at a Dynaudio dealer.

I'm a big fan of the dynaudio sound and have loved my 52se's I'm looking for something that will have a less congested midrange and more refined sound-stage and a little deeper bass extension. My system is in the living room, hardwood floors with rugs, curtained side walls. dimensions? Not sure. Volume has not been a problem. Listening habbits are about 30% critical listening with speakers optimally placed away from all walls on HEAVY steel stands, and 70% background music.
Does this help? Picture of set up here: http://i151.photobucket.com/albums/s140/Ucrazykid/Stereo_zps30bca0e0.jpg

I owned the Contour S1.4 on two separate occasions over the past ten years. Your electronics are fine. I think you will be very happy with the upgrade. Enjoy!

if s1.4 is next step, you should take another step ahead and save yourself some time and money upgrading meaning you should go for c1 instead.

I pulled the trigger on the S1.4's. They are awesome.
Thanks all for your input.

C1's are out of budget for now.

Well here we are almost 5 years later and the upgrade bug has hit me again. The s1.4 have been great and triggered several other upgrades. I am now running the Musical Fidelity A3.2CR separates (Pre/Amp) and a modified MSB Gold DAC. Considering the Dynaudio C1 or C2 Platinums. Or maybe the new Contour 20 now that they have the Esotar2 tweeter. 

Although I have not heard them the new Dynaudio Evoke has got great reviews for the money from Axpona. I owned the C1's and later the C1 signature. Great monitor. I had an in home demo of the original C2 but did not care for the vertical sound stage. But that is my opinion. Contour 20's will have more punch than the C1's.

That said you do know that version of the Confidence has been discontinued along with the Evidence so pre owned pricing should come down.
Here is a link to current products and retail pricing

https://www.dropbox.com/s/tvyel0mvldyeroa/Dynaudio_Consumer_Buying_Guide_Spring_2019_low_res.pdf?dl=0&fbclid=IwAR0v8_GkGFc1eXyo706ogwM7agSQWRReKTFBHlqLY-UM05oWS0056MduVoQ  

Thanks for your comments. I found a good deal on a set of demo Confidence C1 Platinum's and am loving them. I listened to some C2's, the new Contour C60's and C20's and really found I preferred the C1 sound and size/form factor.