Tonearm Suggestions For Technics Sp15 Under 5k

It must be "10.5 or "12 inch tonearm to mount it, it will be impossible to mount ’9 inch tonearm, so first check pivot to spindle distance.

Under 3k you can get Technics EPA-100 mkII rarity or short version of brand new Reed 3P. I assume you can’t believe that classic inexpensive tonearm can be really good, so i will not recommend nice arms under 1k.

On www.Reed.lt  you will find various options, different models with different armwands of different mass. Up to you, i can only prove that Reed is outstanding tonearms, i’ve been using my 3P Cocobolo "12 on my ex SP-10mkII and it was huge upgrade over the EPA-100 (but not mkII).  

With Reed 3p you can adjust not only VTA on the fly (super smooth and precisely), but also cartridge azymuth on the fly! Imagine this (very important for carts with advanced styli). I don’t know any other tonearm with azymuth on the fly! Reed is a top class high-end tonearm, i think "12 inch version is under 5k Euro new.

@chakster please don't hold back any suggestions regardless of price. The least pricey that sounds as good or better than much more expensive the better. you were thinking Jelco right? 

Not the Jelco, it would be too simple to advice it.
In my opinion the best buy would be Victor UA-7045  ( pivot to spinde distance is 230mm) or longer 7082. No problem to mount both models on your Technics SP15

Some of the a'gon long time members putting those Victor on the same level as Lustre GST-801, the onyl difference is the lower price for Victor which is great for the buyers. It is so nice when top quality products are underrated on the market, this is the reason the price is under $750 max. This tonearm deserve much higher price! It's a very user friendly design. 

For very high compliance cartridges (30-50cu) i would also recommend low mass Luxman TA-1 (pivot to spindle distance is about 225mm and it will be very close to the ende of the SP15). The top of the line version of TA-1 has removable armwand and toneam stabilizer from beneath. It was made by Micro Seiki for Luxman (Micro also made direct drive motors for Luxman). I think the price is the same as Victor (under $750). You can see both LUX TA-1 and Victor on my turntable. 

Luxman TA-1 looks like the high-end version of Infinity Black Widow, the quality of TA-1 is much much better. It is hard to find light mass tonearm nowadays for the vintage high compliance MM cartridges. This Luxman TA-1 is a good one for them. 

P.S. I saw removed post in your thread, but i want to let you know that it will be impossible to mount new Technics stock toneam from SL1200G to your SP15, there is no room to accomodate the big base in appropriate pivot to spinge distance, and it's "9 inch tonearm.

For ultra high-end my advice is Reed 3P or related  

Thanks @chackster i was going mention sony pua models. Would you say your above choices are superior to anything sony made armwise? I may sell my technics 1200mk2 after i get the sp15..the sp15 come in a huge plinth