Digital BW, The Print

Hello everybody,

I am now completely lost with all the new published softwares 
concerning mainly RIPs: ImagePrint, QuadtoneRIP, IJC, OPM,...

I use PiezographyBW (latest version) with a 1160 and MIS inks and EAM 
(I ordered also some Photorag for the next weeks).

One of my question is : how to upgrade the system/workflow? Some of 
my prints are great, but many are disapointing from a technical point 
of view (and do not match with what I had on my screen).

So now,

- should I consider the Piezography plugin obsolet (though it 
includes many profiles for different papers and is compatible with 
the MIS FS Neutral inks)? 

-  is it worth to buy on ebay a densitometer (like the x rite 810 
which is recommanded by many of you) and withe it create a dot gain 
curve thanks to which screen images and final prints will match? 

- shall I invest in one of these RIP softwares (and apparently a 
densitometer like the x rite 810 is necessary, am I wrong?) and make 
my own profiles (but I use always the same papers and the same inks)?

Thank you for your help

JM Humbert
Paris, France