I found an obscure FASA discription of this Class so I thought I'd give it a go. This will be my last one for a while as R/L is in full effect again. Still needs texture work and regs but here's a sneak peak...........
OUTALANCE SHIPYARDS
U.S.S. Sirius NCC 1400
Sirius-class Medium-range Exploration Cruiser
The Sirius class was a four-nacelled design from the 2220s which remained in service until the 2280s when the newer Constellation-class replaced them.
Sirius class starships were used for medium-range exploration missions and border patrols.
When Starfleet began its refit program for the Constitution, Akula and Triton classes, it was decided that it was simpler to replace the Sirius class with a similar design of brand new vessels due to the complexities of the four nacelle design.
The Sirius-class provided data used on several later designs of four nacelle ships including the Constellation, Cheyenne and Prometheus classes.